The World’s first non-battery cell phone that harvests ambient radio waves to power itself

A team of computer scientists and electrical engineers at the University of Washington have designed and unveiled the world’s first battery-free mobile phone that makes use of ambient radio waves or light to function. The phone was touted to “harvest” a few microwatts of power from the said sources to send and receive calls. The team even reported placing Skype calls using the battery-free phone, which demonstrated that it can be used to receive and transmit speech and communicate with a base station. The phone was made of commercial, off-the-shelf components. Read more...